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08 March 2009

Chronic bronchitis doesn't affect just the lungs, but the heart and kidneys too

Chronic bronchitis (CB) is a case of upper respiratory inflammation that is almost exclusively caused by smoking (1). In fact, non-smokers don't get CB even after long-term inhalation of industrial pollutants, but those pollutants might just exacerbate existing CB in smokers (1).

You'd think at first that this was just a lung disease. But when you've had CB for awhile, poor breathing can produce hypoxemia and hypercapnia, which can trigger a pulmonary vasoconstriction reflex that increases the right heart's workload (1).

And chronic hypoxemia can do further damage. It will also increase secresion from the kidneys of erythropoietin (1). This, causes the bone marrow to increase red blood cells (which is why you can test for CB using a hematocrit assay) (1). The high red blood cell count make your blood flow like maple syrup, which can cause possible thrombosis (1).

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About Me

I'm a science and health writer based in the Gilbert, Ariz., with a passion for good food combined with a good story. My background is in science communications with a master's of science degree in human nutrition and a bachelor's of arts degree in English. I've written for a variety of publications including Scientific American, Outside Online, the American Society for Nutrition's Nutrition Notes Daily, and the Institute of Food Technologists' Food Technology print magazine. I'm an active member of several respected organizations including the National Association of Science Writers and the American Association for the Advancement of Science. I'm also interested in wildlife conservation and am a member of the National Audubon Society and the American Society of Naturalists.